diff --git a/src/main.rs b/src/main.rs
index 231ce7c..61d5c50 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -28,8 +28,8 @@ fn play(mut s: seq::SynSeq, sample_rate: usize, bpm: usize) {
         sample_rate: sample_rate,
         channel_sample_count: samples_per_beat,
     };
-    let beats = s.beats();
-    let duration = 1 + 60 * beats / bpm;
+    let beats = s.beats() + 3;
+    let duration = 60 * beats / bpm;
 
     let sample_count = (params.channel_sample_count) as usize;
     let mut left: Vec<f32> = vec![0_f32; sample_count];
diff --git a/src/seq.rs b/src/seq.rs
index 3910bad..0639a41 100644
--- a/src/seq.rs
+++ b/src/seq.rs
@@ -44,8 +44,8 @@ impl SynSeq {
    pub fn beats(&self) -> usize {
       let mut longest = 0 as usize;
       for (_, seq) in self.seqs.iter() {
-         longest = if seq.beats.len() > longest {
-            seq.beats.len()
+         longest = if seq.len() > longest {
+            seq.len()
          } else {
             longest
          };
@@ -56,7 +56,7 @@ impl SynSeq {
 
 #[derive(PartialEq)]
 pub struct Seq {
-   beats: Vec<(i32, tone::Tone)>,
+   beats: Vec<(usize, tone::Tone)>,
    state: Option<tone::Tone>,
 }
 
@@ -72,6 +72,14 @@ impl Seq {
       }
    }
 
+   fn len(&self) -> usize {
+      let mut sum = 0 as usize;
+      for beat in self.beats.iter() {
+         sum += beat.0 as usize;
+      }
+      sum
+   }
+
    fn pop(&mut self) -> (Option<tone::Tone>, bool) {
       let state_before = self.state.clone();
       let tone_after = self._pop();
@@ -109,7 +117,7 @@ impl Seq {
       let n = match captures.name("count") {
          Some(number) if number.as_str().len() > 0 => number.as_str().parse::<usize>().unwrap(),
          _ => 1,
-      } as i32;
+      } as usize;
 
       let tone = tone::new(captures.name("tone").unwrap().as_str());
       self.beats.push((n, tone));
@@ -123,14 +131,18 @@ mod test {
    #[test]
    fn test_seq() {
       let mut seq = new();
+
       seq.append("c");
       seq.append("4d");
       seq.append("g 2e");
+
       assert_eq!(seq.beats.len(), 4);
-      assert_eq!(seq.beats[0], (1 as i32, tone::new("c")));
-      assert_eq!(seq.beats[1], (4 as i32, tone::new("d")));
-      assert_eq!(seq.beats[2], (1 as i32, tone::new("g")));
-      assert_eq!(seq.beats[3], (2 as i32, tone::new("e")));
+      assert_eq!(seq.len(), 8);
+
+      assert_eq!(seq.beats[0], (1 as usize, tone::new("c")));
+      assert_eq!(seq.beats[1], (4 as usize, tone::new("d")));
+      assert_eq!(seq.beats[2], (1 as usize, tone::new("g")));
+      assert_eq!(seq.beats[3], (2 as usize, tone::new("e")));
 
       assert_eq!(seq.pop(), (Some(tone::new("c")), true));
       assert_eq!(seq.pop(), (Some(tone::new("d")), true));